从盐水中直接提取的实验和反应式运输建模研究 含有Li/Al层双氧化物的盐水
Muhammed Rashik Mojid1, Jiahui You1, Kyung Jae Lee1
1Department of Petroleum Engineering, University of Houston, 5000 Gulf Freeway, Building 9, Houston, TX 77204, USA.
Journal of contaminant hydrology
|August 15, 2025
概括
本研究介绍了/ (Al) 层双氧化物 (LDH) 用于从盐中选择性回收 (Li). 这种新的方法将实验数据与计算流体动力学集成在一起,以有效地提取,这对电池技术至关重要.
科学领域:
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
- 环境科学 环境科学
背景情况:
- 全球需求正在增加,原因是电力运输中的离子电池.
- 天然盐水含有,但也含有,,和等干扰,使提取复杂化.
- 从盐水中选择性回收是可持续能源解决方案的关键挑战.
研究的目的:
- 研究从合成盐水中选择性提取离子 (Li+),使用合成的/ (Al) 层双氧化物 (Li/Al-LDH).
- 开发和验证一种新的计算流体动力学 (CFD) 模型,用于模拟回收过程中的反应运输.
- 评估/Al-LDH在提取中的吸附能力,动力学和选择性.
主要方法:
- 使用SEM,EDX,FTIR,XRD,TGA和BET等技术合成和描述Li / Al-LDH.
- 使用伪二次模型评估Li+吸附动力学,并确定平衡能力.
- 开发一种CFD模型,将伪二次动力学与对流-扩散和达西-布林克曼-斯托克斯方程相结合.
主要成果:
- /Al-LDH的结构,形态和表面特性与层叠的双氧化物材料相一致.
- 集成的CFD模型准确地预测了回收过程中的反应运输,与实验数据保持一致.
- 在25°C时达到12.765 mg/g,在45°C时达到18.5 mg/g的最大Li+吸附能力.
- 观察到Li+比竞争中的离子具有特殊的选择性,Li+/Mg2+分离因子为143.47.7.
结论:
- 开发的Li/Al-LDH材料显示出从盐水中提取的高效率和选择性.
- 集成的实验和CFD建模框架为优化回收过程提供了强大的工具.
- 这项研究为推进选择性吸附剂设计和提高工业提取过程效率提供了有希望的途径.
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